Drill bit assembly



FIG. 1 is a front perspective view of a drill bit assembly;

FIG. 2 is a front view of the drill bit assembly of FIG. 1, which has been enlarged for clarity;

FIG. 3 is a rear view of the drill bit assembly of FIG. 1, which has been enlarged for clarity;

FIG. 4 is a left side view of the drill bit assembly of FIG. 1;

FIG. 5 is a right side view of the drill bit assembly of FIG. 1;

FIG. 6 is a top view of the drill bit assembly of FIG. 1; and,

FIG. 7 is a bottom view of the drill bit assembly of FIG. 1.

The broken lines in the drawing indicate environmental structure and form no part of the design to be patented. 

CLAIM The ornamental design for a drill bit assembly, as shown and described. 